Stabilizing element for a shoe upper

ABSTRACT

A shoe may include a shoe upper, an outsole, and a stabilizing element. The stabilizing element may extend from the outsole upward towards a step-in opening of the shoe upper and rearward towards a heel region of the shoe. Further, the stabilizing element may include an outer layer. The stabilizing element may extend along an outside of the shoe upper. Moreover, an area of the outside of the shoe upper that is not covered by the stabilizing element may be located between the stabilizing element and the outsole. Furthermore, the area may continuously transition into a further area of the outside of the shoe upper which is not covered by the stabilizing element. That further area may extend into a portion of the shoe upper which is configured to receive an Achilles area and/or an Achilles tendon insertion.

CROSS REFERENCE TO RELATED APPLICATION

This application is related to and claims priority benefits from European Patent Application No. 23155856.0, filed on Feb. 9, 2023, entitled Stabilizing Element for a Shoe Upper (“the '856 application”) and German Patent Application No. DE 10 2022 201 465.0, filed on Feb. 11, 2022, entitled Stabilizing Element for a Shoe Upper (“the '465 application”). The '856 and '465 applications are hereby incorporated herein in their entirety by this reference.

TECHNICAL FIELD

The present disclosure relates to a shoe comprising a shoe upper, an outsole, and a stabilizing element. Further, some embodiments relate to a method for manufacturing at least one lockdown element in a shoe upper, a respective shoe upper, and/or a shoe comprising said shoe upper.

BACKGROUND

When designing shoes, a compromise is often made between comfort, functionality, and safety. For example, a soccer shoe may offer outstanding comfort due to a pronounced cushioning. However, this same soccer shoe may have deficits due to the pronounced cushioning regarding functionality, e.g., a limited feel for the ball, and regarding safety, e.g., an insufficient stabilization of the ankle.

Nevertheless, a fundamental objective is to increase the comfort as well as the functionality and the safety of a shoe. Especially for sports and outdoor activities, it is desirable that a shoe is comfortable to wear, ensures a low risk of injury, and fulfills the function intended for the shoe. In this direction, some embodiments herein aim to solve a first and a second problem.

The first problem to which some embodiments are directed is the design of stabilizing elements for ankle stabilization. For various kinds of shoes, ankle stabilization may prevent injury to the ankle and/or avoid ligament injuries. For example, when a soccer player takes a shot while standing on a soft and/or uneven surface, there is an increased risk of twisting one's ankle, which may lead to injuries. Accordingly, stabilizing elements may be applied to the shoes, particularly soccer shoes. However, stabilizing elements known in the prior art have several drawbacks. Either the existing stabilizing elements do not provide sufficient stabilization and/or are uncomfortable up to such an extent that it affects the health of the foot.

The existing stabilizing elements of a first group enclose the heel region and extend from an outsole of a shoe towards a medial ankle area and a lateral ankle area and towards the Achilles area. Thereby such stabilizing elements extend from a lateral side of the shoe to a medial side of the shoe and at least partially enclose the Achilles area and particularly the Achilles tendon insertion.

Since these stabilizing elements are formed around the heel region, they provide good ankle stability to the wearer. This is as these stabilizing elements tightly clasp the heel portion. However, they exert a pressure onto the Achilles area and particularly the Achilles tendon insertion. This is uncomfortable for the wearer, especially during running. Even further, said pressure on the Achilles area and particularly on the Achilles tendon insertion may lead to an irritation or even an inflammation of the Achilles tendon.

The existing stabilizing elements of a second group extend from an outsole of a shoe towards a medial ankle area or a lateral ankle area. Thereby these stabilizing elements do not extend from a lateral side of the shoe to a medial side of the shoe and therefore do not enclose the Achilles area. Rather, a first stabilizing element is provided on the lateral side of the shoe and a second stabilizing element is provided on the medial side of the shoe.

Accordingly, such stabilizing elements may avoid that a pressure is applied onto the Achilles area and particularly the Achilles tendon insertion. Hence, an increased comfortability may be provided. Moreover, an irritation or even an inflammation of the Achilles tendon may be avoided. However, since the existing stabilizing elements of the second group do not tightly clasp the heel region, they provide less stability to the wearer.

Therefore, it is a first object underlying some embodiments herein to provide a shoe comprising a stabilizing element which maximizes stability, while minimizing pressure on the Achilles area and the Achilles tendon insertion in particular.

The second problem to which some embodiments are directed refers to the desire to keep a foot of a wearer fixed inside the shoe, preferably in a comfortable manner.

In general, laces are known to fix the wearer's foot in the shoe. Further, the use of stretchable elements and hook and loop fasteners is common to fix the wearer's foot in the shoe. However, in some cases, additionally, a further mechanism of fixing the foot in the shoe is desirable. Exemplarily, when a particularly good hold within the shoe is desirable. Even further, in some cases it may also be implemented that a shoe has no laces. One reason therefor may be to provide a soccer shoe that allows a particularly good feel for the ball in the top midfoot area. Another reason may be that tight laces are often perceived as unpleasant.

It is therefore a second object underlying some embodiments to provide mechanisms which improve the fixation of the foot of a wearer inside a shoe.

SUMMARY

The terms “invention,” “the invention,” “this invention” and “the present invention” used in this patent are intended to refer broadly to all of the subject matter of this patent and the patent claims below. Statements containing these terms should be understood not to limit the subject matter described herein or to limit the meaning or scope of the patent claims below. Embodiments of the invention covered by this patent are defined by the claims below, not this summary. This summary is a high-level overview of various embodiments of the invention and introduces some of the concepts that are further described in the Detailed Description section below. This summary is not intended to identify key or essential features of the claimed subject matter, nor is it intended to be used in isolation to determine the scope of the claimed subject matter. The subject matter should be understood by reference to appropriate portions of the entire specification of this patent, any or all drawings and each claim.

According to certain embodiments, a shoe includes a shoe upper; an outsole; and a stabilizing element. The stabilizing element extends from the outsole upward towards a step-in opening of the shoe upper and rearward towards a heel region of the shoe. The stabilizing element includes an outer layer. The stabilizing element extends along an outside of the shoe upper. A first area of the outside of the shoe upper is not covered by the stabilizing element. The first area is located between the stabilizing element and the outsole. The first area continuously transitions into a second area of the outside of the shoe upper which is not covered by the stabilizing element. The second area extends into a portion of the shoe upper which is configured to receive an Achilles area and/or an Achilles tendon insertion. The outer layer of the stabilizing element is integrally formed with the outsole of the shoe.

In some embodiments, the second area extends from a lateral side of the shoe to a medial side of the shoe. The stabilizing element may include an inner layer. The inner layer and the outer layer may include different materials.

According to certain embodiments, a shoe includes a shoe upper; an outsole; and a stabilizing element. The stabilizing element extends from the outsole upward towards a step-in opening of the shoe upper and rearward towards a heel region of the shoe. The stabilizing element includes an inner layer and an outer layer. The inner layer and the outer layer include different materials. The stabilizing element extends along an outside of the shoe upper.

In some embodiments, the outer layer of the stabilizing element is integrally formed with the outsole of the shoe. An area of the outside of the shoe upper may be not covered by the stabilizing element. The area may be located between the stabilizing element and the outsole. The area may continuously transition into a further area of the outside of the shoe upper which is not covered by the stabilizing element. The further area may extend into a portion of the shoe upper which is configured to receive an Achilles area and/or an Achilles tendon insertion. The further area may extend from a lateral side of the shoe to a medial side of the shoe. The area may have a size of at least 100 mm2. The stabilizing element may include a wing shape, a parallelogram shape, a trapezoid shape, an elliptical shape, and/or a rectangular shape. A shape of the stabilizing element may be at least limited by two straight edges which extend along the outside of the shoe upper upward towards the step-in opening and rearward towards the heel region. The two edges may have a length of at least 10 mm. The outer layer may include a thickness from 0.01 mm to 3 mm. The inner layer may include a thickness from 0.01 mm to 3 mm. The shape of the inner layer may correspond to the shape of the outer layer. The inner layer may extend beyond the outer layer. The inner layer may include a composite layer. The composite layer may include a carbon fiber reinforced layer. The outer layer may include a reinforcement rib extending from the outsole along the outer layer of the stabilizing element. The outer layer may include a composite layer. The outer layer may extend from a composite module of the outsole. A line on the outside of the shoe upper which extends substantially straight along the Achilles area, from the outsole to the step-in opening may be not covered by the inner layer and/or the outer layer, where said line is not covered by the stabilizing element.

In some embodiments, the stabilizing element may be a first stabilizing element and the shoe may include a second stabilizing element. The first stabilizing element may be arranged on a lateral side of the shoe, and the second stabilizing element may be arranged on a medial side of the shoe. The first stabilizing element and the second stabilizing element may be configured to clasp a calcaneus bone and thereby do not apply a pressure to the Achilles area and/or the Achilles tendon insertion. The first stabilizing element and the second stabilizing element may be arranged to not cover a portion of the shoe upper which is configured to receive the Achilles area and/or the Achilles tendon insertion. The first stabilizing element and the second stabilizing element may be spaced apart by a distance which extends along the outside of the shoe upper and at least partly along the Achilles area.

BRIEF DESCRIPTION OF THE DRAWINGS

In the following detailed description, embodiments are described referring to the following figures:

lateral view;

FIG. 1 shows an exemplary shoe according to a first aspect in lateral view;

FIG. 2 shows an exemplary shoe according to the first aspect and a fourth aspect in

FIG. 3 shows a detailed view of a rear portion of the exemplary shoe according to the first aspect and the fourth aspect in lateral view;

FIG. 4 shows a detailed view of a rear portion of the exemplary shoe according to the first aspect and the fourth aspect in medial view;

FIG. 5 shows a detailed view of the exemplary shoe according to the first aspect and the fourth aspect in lateral view;

FIG. 6 depicts an exemplary method for manufacturing at least one lockdown element in a shoe upper according the fourth aspect;

FIG. 7 shows a second exemplary shoe according to the first aspect, a second aspect, and the fourth aspect in rear view;

FIG. 8 shows a bottom view of the second exemplary shoe according to the first aspect and the fourth aspect;

FIG. 9 shows a front view of a third exemplary shoe according to the fourth aspect;

FIG. 10 shows the second exemplary shoe according to the first aspect and the fourth aspect in medial view;

FIG. 11 shows a detailed view of the second exemplary shoe according to the first aspect and the fourth aspect, and

FIG. 12 shows a detailed view of the second exemplary shoe according to the first aspect, the second aspect and the fourth aspect.

BRIEF DESCRIPTION

The first object underlying some embodiments is at least partially achieved by the teachings of a first aspect. Further, the first object underlying some embodiments is at least partially achieved by a second aspect. Even further, the first object underlying some embodiments is at least partially achieved by a third aspect. Moreover, the second object underlying some embodiments is at least partially achieved by a fourth aspect.

The first aspect according to a first alternative relates to a shoe comprising a shoe upper, an outsole, and a stabilizing element. The stabilizing element extends from the outsole upward towards a step-in opening of the shoe upper and rearward towards a heel region of the shoe. Optionally, the stabilizing element extends rearward into the heel region of the shoe. Further, the stabilizing element comprises an outer layer. Moreover, the stabilizing element extends along an outside of the shoe upper, wherein an area of the outside of the shoe upper is not covered by the stabilizing element, whereby the area is located between the stabilizing element and the outsole. The area continuously transitions into a further area of the outside of the shoe upper which is not covered by the stabilizing element, whereby the further area extends into a portion of the shoe upper which is configured to receive an Achilles area and/or an Achilles tendon insertion. Furthermore, the outer layer of the stabilizing element is integrally formed with the outsole of the shoe.

“Integrally formed” may refer to the aspect that no material boundary may be identified between the outer layer and the outsole. Particularly, the outer layer and the outsole may be integrally formed by injection molding, direct casting, and/or foaming. Further, the outer layer and the outsole may comprise a polymer material. Particularly, the outer layer and the outsole may comprise polyamide, polyurethane, and/or rubber. By integrally forming the outer layer with the outsole, the outer layer may be provided with a higher pretension against the inner layer. Accordingly, a higher pressure onto the heel region of the wearer may be applied. Furthermore, the work steps may be reduced.

The area of the outside of the shoe upper which is not covered by the stabilizing element, and which is located between the stabilizing element and the outsole, may be at least partially limited by an axis which substantially perpendicularly extends from the outsole to the stabilizing element. More particular, said axis may extend substantially perpendicularly from a plane of expansion of the outsole of the shoe to the rearmost point of the stabilizing element. Said area which is not covered by the stabilizing element at least partially avoids that an uncomfortable pressure on the Achilles area is applied. Particularly, said area may avoid that the stabilizing element exerts a pressure on an insertion of the Achilles tendon. Hence the comfortability of the shoe may be increased and/or irritations of the Achilles tendon may be avoided. It is understood that further areas of the shoe upper besides the area of the outside of the shoe upper which is located between the stabilizing element and the outsole may also be not covered by the stabilizing element.

The above-mentioned further area additionally avoids that an uncomfortable pressure on the Achilles area is applied. Particularly, said further area may avoid that the stabilizing element exerts a pressure on an insertion of the Achilles tendon. Moreover, the flexibility of the shoe upper may be not impeded by the stabilizing element in the Achilles area and/or at the Achilles tendon insertion. Hence, the comfortability of the shoe may be increased and/or irritations of the Achilles tendon may be avoided. The further area in some embodiments extends from a lateral side of the shoe to a medial side of the shoe. Thereby said benefits may be even further emphasized.

Further it is understood that the outer layer of the stabilizing element may be directly applied on the outside of the shoe upper. Exemplarily, the outer layer of the stabilizing element may be attached to the outside of the shoe upper by use of stitching, thermal welding, and/or gluing. However, the outer layer of the stabilizing element may be in contact with the outside of the shoe upper without being additionally attached to the outside of the shoe upper. Even further, it will be also understood that the outer layer as described above may be more generally referred to as “layer”. Nevertheless, in view of further features according to some embodiments which are described below, the term “outer layer” facilitates understanding.

Moreover, the stabilizing element of the shoe according to the first alternative of the first aspect of some embodiments may comprise an inner layer. It is understood that the inner layer may be arranged between the outer layer and the outside of the shoe upper. By use of the inner layer, further support may be provided and a separation of functions within the stabilizing element may be achieved. Exemplarily, the inner layer may provide support to the foot of the wearer, whereas the outer layer serves to clasp the inner layer towards the foot of the wearer. Thereby, the amount of material for the stabilizing element may be reduced as the inner layer and the outer layer are optimized regarding the specific function they fulfill.

Moreover, a lower rearward edge of the stabilizing element may extend from the outsole upward towards a step-in opening of the shoe upper and rearward towards a heel region of the shoe, wherein the angle between the lower rearward edge of the stabilizing element and the plane of expansion of the outsole is in some embodiments between 10° and 90°, or between 15° and 60°, or between 20° and 50°, or between 30° and 40°. The lower rearward edge may limit the stabilizing element at least partly in a posterior direction. Further, the stabilizing element may be at least partly limited in the posterior direction by a superior rearmost edge of the stabilizing element, wherein the superior rearmost edge may be arranged offset from a rearmost line of the upper, which extends from an outsole upward towards a step-in opening. The superior rearmost edge may be arranged in a superior direction from the lower rearward edge. The stabilizing element may be fully limited in the posterior direction by the superior rearmost edge and/or the lower rearward edge. It will be understood that by use of the foregoing the above-mentioned area of the outside of the shoe upper which is not covered by the stabilizing element, and which is located between the stabilizing element and the outsole may be alternatively described.

Moreover, the first aspect according to a second alternative refers to a shoe comprising a shoe upper, an outsole, and a stabilizing element. The stabilizing element extends from the outsole upward towards a step-in opening of the shoe upper and rearward towards a heel region of the shoe. Optionally, the stabilizing element extends rearward into the heel region of the shoe. Further, the stabilizing element comprises an inner layer and an outer layer. Moreover, the inner layer and the outer layer comprise different materials. The stabilizing element extends along an outside of the shoe upper.

The different materials allow a separation of functions. The inner layer may comprise a material with a higher stiffness and/or a higher strength than the outer layer. Exemplarily, the inner layer may comprise a fiber reinforced polymer. Further, the outer layer may comprise a material with a higher elasticity or higher stiffness than the inner layer. Exemplarily the outer layer may comprise a polyamide material. Thus, the inner layer may provide support, whereas the outer layer may clasp the inner layer to the shoe upper. Accordingly, the stabilizing element may be clasped to the heel and/or the ankle of a wearer. Thereby, the stability may be increased. Further, due to specific use of materials the weight of the stabilizing element may be reduced. Exemplarily, the inner layer, which comprises a fiber reinforced polymer, can comprise a reduced thickness due to a higher tensile strength. Moreover, the inner layer may be adapted to the properties of the foot of a wearer, whereas the outer layer may remain unchanged. Hence, due to the separation of functions in the stabilizing element by using different materials, the modification effort may be reduced. The inner layer and/or the outer layer may comprise a polymer such as polyamide, polyurethane and/or rubber. Particularly, the inner layer and/or the outer layer may comprise ethylene-vinyl acetate (EVA), Polyamide 11 (PA 11) and/or Polyamide 12 (PA 12). Further, the inner layer and/or the outer layer may comprise a thermoplastic elastomer (TPE) such as polyether block amide (PEBA) and/or thermoplastic polyurethane (TPU). Moreover, the inner layer and/or the outer layer may comprise composite materials, natural materials, and/or metals.

The inner layer and the outer layer of the shoe according to the first alternative may comprise different materials. Thereby the configurations and/or benefits of the previous paragraph may be considered.

The shoe according to the second alternative may be further specified in that an area of the outside of the shoe upper is not covered by the stabilizing element, whereby the area is located between the stabilizing element and the outsole. Said area may be at least partially limited by an axis which perpendicularly extends from the outsole to the stabilizing element. More particular, said axis may extend perpendicularly from a plane of expansion of the outsole of the shoe to the rearmost point of the stabilizing element. It will be understood that said axis may be a virtual axis and may serve to define the area. Said area may avoid that an uncomfortable pressure on the Achilles area is applied. Particularly, said area may avoid that the stabilizing element exerts a pressure on an insertion of the Achilles tendon. Hence, the comfortability of the shoe may be increased and/or irritations of the Achilles tendon may be avoided. It is understood that further areas of the shoe upper besides the area of the outside of the shoe upper which is located between the stabilizing element and the outsole may also be not covered by the stabilizing element.

Moreover, a lower rearward edge of the stabilizing element may extend from the outsole upward towards a step-in opening of the shoe upper and rearward towards a heel region of the shoe, wherein the angle between the lower rearward edge of the stabilizing element and the plane of expansion of the outsole is in some embodiments between 10° and 90°, or between 15° and 60°, or between 20° and 50°, or between 30° and 40°. The lower rearward edge may limit the stabilizing element at least partly in a posterior direction. Further, the stabilizing element may be at least partly limited in the posterior direction by a superior rearmost edge of the stabilizing element, wherein the superior rearmost edge may be arranged offset from a rearmost line of the upper, which extends from an outsole upward towards a step-in opening. The superior rearmost edge may be arranged in a superior direction from the lower rearward edge. The stabilizing element may be fully limited in the posterior direction by the superior rearmost edge and/or the lower rearward edge. It will be understood that by use of the foregoing, the above-mentioned area of the outside of the shoe upper which is not covered by the stabilizing element, and which is located between the stabilizing element and the outsole may be alternatively described.

It will be understood that the following is directed to the first alternative of the first aspect and to the second alternative of the first aspect. Further, according to some embodiments the term “rearward” with respect to a shoe refers to a direction which directs from a tip of the shoe towards an Achilles area of the shoe. Hence a “rearmost” point of an element of the shoe is the point which has the largest distance to the tip of the shoe. Further, according to some embodiments, the term “upward” refers to a direction which directs from the outsole to the shoe upper.

The shoe according to some embodiments may be a sports shoe, a daytime shoe, a casual shoe, and/or a work shoe. Further, said shoe may be a soccer shoe, a running shoe, a mountaineering boot, a climbing boot, a ski boot, a cross-country skiing boot, and/or a basketball shoe. The mentioned examples are not exhaustive.

The shoe upper may comprise a polymer material and/or a natural material, such as leather and/or natural fibers. Moreover, the shoe upper may comprise a woven material, a knitted material, a material with unidirectional fibers, and/or a material without fibers. In some embodiments, the material of a major part of the shoe upper comprises a lower stiffness than the material of the inner layer and/or the outer layer of the stabilizing element.

The stabilizing element may serve to fix a heel of a wearer within the shoe. Particularly, the stabilizing element may press the heel towards the sole. Thereby, mainly the Calcaneus bone may be pressed towards the sole, in some embodiments without applying a load onto the Achilles area and particularly the Achilles tendon insertion. By fixating the heel of a wearer within the shoe, an instability due to heel slippage inside the shoe may be avoided. Hence, the stabilizing element may serve to stabilize the ankle of a wearer at least indirectly. Moreover, by stabilizing the ankle of a wearer at least indirectly, a twisting of the ankle may be avoided. The term ankle in some embodiments may be also referred to as ankle joint.

The stabilizing element may be in contact with the outsole. Thereby, the stabilizing element may extend from a rear half of the shoe. Further, the stabilizing element may extend from the heel region of the shoe and/or an underfoot area of the shoe. According to some embodiments, the heel region may be referred to as a region, which encloses a heel and/or a Calcaneus bone of a wearer. The step-in opening may be also referred to as a throat opening.

The use of at least two layers, e.g., the inner layer and the outer layer, may allow that a graduation of stabilization is achieved. Exemplarily, areas of the shoe upper which warrant less stabilization may be covered by only one layer, wherein areas which warrant more stabilization may be covered by at least two layers. Further, by use of the at least two layers of the stabilizing element, a separation of functions may be achieved. The inner layer may be more rigid compared to the outer layer and/or designed to provide a stable shape. The outer layer may be more elastic compared to the inner layer and/or designed to clasp the inner layer towards the inside of the shoe. Hence, by use of the separation of functions, the stabilizing element itself may be provided with a stable shape and may further provide sufficient pressure to the heel region and/or ankle region. Both aspects contribute to an improved stabilization. Further, in some alternative embodiments, the outer layer may be more rigid compared to the inner layer and/or designed to provide a stable shape. The inner layer may be more elastic compared to the outer layer and/or designed to conform to the shape of the foot.

The stabilizing element may comprise further layers besides the inner layer and the outer layer. Exemplarily, between the inner layer and the outside of the shoe upper, an adhesive layer may be applied. Further exemplarily, an adhesive layer may be also applied between the inner layer and the outer layer.

The stabilizing element extending along an outside of the shoe upper may be fixedly attached to the outside of the shoe upper. Particularly, the inner layer and/or the outer layer may be stitched, glued, and/or thermally welded to the outside of the shoe upper. Thus, the stabilization by use of the stabilizing element may be further increased.

The area of the outside of the shoe upper which is not covered by the stabilizing element and located between the stabilizing element and the outsole may have a size of at least 100 mm², or of at least 150 mm², or of at least 200 mm², or of at least 250 mm², or of at least 300 mm². These sizes ensure that the pressure which is applied onto the Achilles area is minimized. Particularly, the application of a pressure onto the Achilles tendon insertion may be avoided at least partially.

In the shoe according to the second alternative of the first aspect, the area of the outside of the shoe upper which is not covered by the stabilizing element and located between the stabilizing element and the outsole may continuously transition into a further area of the outside of the shoe upper which is not covered by the stabilizing element. Thereby, the further area may extend into a portion of the shoe upper which is configured to receive an Achilles area and/or an Achilles tendon insertion, whereby the further area in some embodiments extends from a lateral side of the shoe to a medial side of the shoe. Said further area may additionally avoid that an uncomfortable pressure on the Achilles area is applied. Particularly, said further area may avoid that the stabilizing element exerts a pressure on an insertion of the Achilles tendon. Moreover, the flexibility of the shoe upper may be not impeded by the stabilizing element in the Achilles area and/or at the Achilles tendon insertion. Hence, the comfortability of the shoe may be increased and/or irritations of the Achilles tendon may be avoided.

The stabilizing element may comprise a wing shape, a parallelogram shape, a trapezoid shape, an elliptical shape, and/or a rectangular shape. Thereby the shapes may comprise edges which are rounded. Further, it will be understood that the explicit geometric equivalence is not required. Particularly, the inner layer and/or the outer layer may comprise a wing shape, a parallelogram shape, a trapezoid shape, an elliptical shape, and/or a rectangular shape. These shapes may serve to cover the ankle area optimally. Particularly the parallelogram shape may be beneficial since one side may be attached or integrally formed with the outsole, wherein two parallel sides extend towards and optionally into the heel region and upward towards the step-in opening. As aforementioned, the explicit geometric equivalence for the parallelogram shape is not required. Hence, regarding the parallelogram shape it will be understood that the two parallel sides extending towards and optionally into the heel region and upward towards the step-in opening are not required to be exactly parallel.

A shape of the stabilizing element may be at least limited by two straight edges which extend along the outside of the shoe upper upward towards the step-in opening and rearward towards the heel region, wherein the two edges in some embodiments have a length of at least 10 mm, or at least 15 mm, or at least 20 mm, or at least 25 mm. It will be understood that the straight edges need not necessarily be exactly straight in the geometric sense. Rather, the straight edges may be substantially straight in the geometric sense. This may include that at least one of the straight edges is slightly curved, e.g., with a decreasing gradient or an increasing gradient as seen from the surface defined by the outsole. The two straight edges may limit a shape of the inner layer and/or the outer layer. Thereby, an angle between the outsole and at least one of the straight edges may range from 5 degrees to 70 degrees, or from 10 degrees to 60 degrees, or from 15 degrees to 50 degrees, or from 20 degrees to 40 degrees, or from 25 degrees to 35 degrees. With said two straight edges limiting the shape of the stabilizing element it may be ensured that no pressure (or less pressure) is applied on the Achilles tendon insertion.

The inner layer and/or the outer layer may each comprise a thickness from 0.01 mm to 3 mm, or from 0.1 mm to 2 mm, or from 0.2 mm to 1 mm, or from 0.25 mm to 0.5 mm, and or from 0.28 mm to 0.32 mm. Said thickness ranges allow for a good compromise between stiffness, e.g., stabilization of the foot, and comfort.

The stabilizing element may extend at least partially into a lateral ankle area or a medial ankle area. The term ankle area according to some embodiments in general refers to the area of the shoe upper which covers the area of the foot which comprises the ankle, e.g., the ankle joint. The term medial ankle area according to some embodiments may refer to the area of the shoe upper which covers the area of the foot which comprises ligaments between Tibia and Calcaneus bone. Further, the term lateral ankle area according to some embodiments may refer to the area of the shoe upper which covers the area of the foot which comprises ligaments between Fibula and Calcaneus bone.

The outer layer of the stabilizing element of the shoe according to the second alternative of the first aspect may be integrally formed with the outsole of the shoe. Thereby, “integrally formed” may refer to the aspect that no material boundary may be identified between the outer layer and the outsole. Particularly, the outer layer and the outsole may be integrally formed by injection molding, direct casting, and/or foaming. Further, the outer layer and the outsole may comprise a polymer material. Particularly, the outer layer and the outsole may comprise polyamide, polyurethane, and/or rubber. By integrally forming the outer layer with the outsole, the outer layer may be provided with a higher pretension against the inner layer. Accordingly, a higher pressure onto the heel region of the wearer may be applied. Furthermore, the work steps may be reduced.

The shape of the inner layer may correspond to the shape of the outer layer. The term “correspond” may refer to the aspect that the shape of the outer layer lies within the inner layer and/or that at least one edge of the inner layer and/or the outer layer are substantially parallel. This allows loads to be transferred continuously between the inner and outer layer. Thereby a homogeneous stress distribution may be achieved. Hence, material damages due to stress concentrations may be avoided.

The inner layer may extend beyond the outer layer. In some embodiments, the inner layer may extend beyond the outer layer rearwards towards the Achilles area and/or upwards towards the step-in opening. Thus, the inner layer can increase the support of the stabilizing element for the foot. Further, the inner layer may extend beyond the outer layer in an anterior direction towards a toe region of the foot. Thereby, the outer layer may serve to press the inner layer towards the inside of the shoe. Hence, the areas of the shoe upper which are supposed to be stabilized may be easily amended by adapting the inner layer, whereas the outer layer may remain unchanged.

The inner layer may have a larger contour than the outer layer. Particularly, the inner layer may serve to cover the areas of the shoe upper which are supposed to be stabilized. Thereby, the outer layer may serve to press the inner layer towards the inside of the shoe. Hence, the areas of the shoe upper which are supposed to be stabilized may be easily amended by adapting the inner layer, whereas the outer layer may remain unchanged.

The inner layer may comprise a composite layer, wherein the composite layer in some embodiments is a fiber reinforced layer. The term “composite” may refer to the aspect that the layer comprises at least two materials with different material properties. Thereby the composite layer may comprise a fiber reinforced polymer. Particularly, the composite layer may comprise a carbon fiber reinforced polymer, a glass fiber reinforced polymer, a natural fiber reinforced polymer, a ceramic fiber reinforced polymer, and/or an aramid fiber reinforced polymer. Hence, the inner layer may provide high strength and/or high stiffness. Moreover, the weight of the inner layer may be reduced.

Further, the inner layer may comprise anisotropic material properties. By use of anisotropic material properties, the inner layer may be adapted to specific load cases. Exemplarily, fibers in the inner layer may be oriented to provide a high bending stiffness and a low torsion stiffness. Thus, the shoe may offer flexibility and at the same time provides stability against twisting one's ankle.

The outer layer may comprise at least one of the materials ethylene-vinyl acetate (EVA), Polyamide 11 (PA 11), Polyamide 12 (PA 12), thermoplastic elastomer (TPE) such as polyether block amide (PEBA) and/or thermoplastic polyurethane (TPU). Hence, the outer layer may provide high stiffness to clasp the inner layer to the shoe upper. Further, the outer layer may thus be integrally formed with the outsole.

The outer layer may have a triangular cross section. Thereby the cross section of the outer layer may comprise three corners. Said corners may be at least partially rounded. Moreover, the cross section of the outer layer may comprise three edges. Thereby these three edges may be straight or partially curved. Particularly, one edge and/or two of the corners may be in contact with the inner layer. The triangular cross section increases the area moment of inertia of the outer layer, in particular compared to substantially rectangular cross sections with the same area. Hence, the stiffness of the outer layer may be increased.

The outer layer may comprise a varying thickness. Exemplarily, a first portion of the outer layer may have greater thickness than a second portion of the outer layer. Exemplarily, the first portion and the second portion may be separated by a step in the surface of the outer layer. Said step may be a discontinuous change in the surface of the outer layer.

The outer layer may comprise a reinforcement rib. The reinforcement rib may comprise the step which divides the first portion and the second portion of the outer layer, as defined above. The reinforcement rib may extend from the outsole along the outer layer of the stabilizing element. In some embodiments, the outer layer of the stabilizing element is integrally formed with the outsole or a component of the outsole. The reinforcement rib may extend essentially along the full length of the stabilizing element. The reinforcement rib may extend at least partly along the outsole. The reinforcement rib increases the area moment of inertia of the outer layer. Hence, the stiffness of the outer layer may be increased.

The outer layer may comprise a composite layer. With the outer layer comprising a composite layer, the stiffness of the stabilizing element may be further increased. Thus, the stabilizing element may provide even more stability.

The outsole may comprise multiple parts. Exemplarily, the outsole may be formed as a modular assembly. Thereby at least one module of the modular assembly of the outsole may be a composite module. The composite module in some embodiments is a fiber reinforced module. The term “composite” may refer to the aspect that the part comprises at least two materials with different material properties. Thereby the composite module may comprise a fiber reinforced polymer. Particularly, the composite module may comprise a carbon fiber reinforced polymer, a glass fiber reinforced polymer, a natural fiber reinforced polymer, a ceramic fiber reinforced polymer, and/or an aramid fiber reinforced polymer. Exemplarily, the composite module may be a plate or a rod but is not limited thereto. The outsole may comprise multiple composite modules.

Further, at least one module may be connected to the inner layer and/or the outer layer of the stabilizing element. Particularly, the module may be integrally formed with the inner layer and/or the outer layer. Thereby “integrally formed” may refer to the aspect that no material boundary may be identified between the outer layer and the module.

Further, a line on the outside of the shoe upper which extends substantially straight along the Achilles area, from the outsole to the step-in opening, may be not covered by the inner layer and/or the outer layer. Thereby, in some embodiments said line is not covered by the stabilizing element. By use of said line on the outside of the shoe upper which extends substantially straight along the Achilles area, from the outsole to the step-in opening and which is not covered by the inner layer and/or the outer layer, the mobility of the Achilles tendon may be enhanced, improving comfort and/or functionality. This is as the influence of the inner layer and/or the outer layer on a stretching and/or a relaxation of the Achilles tendon is at least reduced. Particularly as the stretching and/or the relaxation of the Achilles tendon may then be primarily limited by the material of the shoe upper. These benefits particularly may apply if the shoe comprises two stabilizing elements as set forth below.

The shoe may comprise two stabilizing elements as defined above, wherein in some embodiments a first stabilizing element is arranged on a lateral side of the shoe, wherein further in some embodiments a second stabilizing element is arranged on a medial side of the shoe. Thereby a shoe with increased lateral and medial stability may be provided. Thus, the risk of twisting in lateral and medial direction is reduced. Moreover, the stabilizing elements, as described above, avoid applying a pressure on the Achilles area and particularly the Achilles tendon insertion.

The inner layer of the first stabilizing element and the inner layer of the second stabilizing element may be connected to each other by a first connecting element. The first connecting element may extend at least partly along a sole region of the shoe. The first connecting element may be formed integrally with the inner layer of the first stabilizing element and the inner layer of the second stabilizing element.

The inner layer of the first stabilizing element and the inner layer of the second stabilizing element may be connected to a module of the modular assembly of the outsole. Particularly, said inner layers may be integrally formed with the module, as described above. Further, the inner layer of the first stabilizing element and the inner layer of the second stabilizing element may be connected to the same module of the modular assembly of the outsole. Thus, the inner layers may be connected to each other via the module. Thereby the stabilization may be further improved without applying a pressure on the Achilles area and particularly the Achilles tendon insertion.

The outer layer of the first stabilizing element and the outer layer of the second stabilizing element may be connected to each other by a second connecting element. The second connecting element may extend at least partly along a sole region of the shoe. The second connecting element may be formed integrally with the outer layer of the first stabilizing element and the outer layer of the second stabilizing element.

The outer layer of the first stabilizing element and the outer layer of the second stabilizing element may be connected to a module of the modular assembly of the outsole. Particularly, the outer layers may be integrally formed with the module, as described above. Further, the outer layer of the first stabilizing element and the outer layer of the second stabilizing element may be connected to the same module of the modular assembly of the outsole. Thus, the outer layers may be connected to each other via the module. Thereby the stabilization may be further improved without applying a pressure on the Achilles area and particularly the Achilles tendon insertion.

The first stabilizing element may extend at least partially into a lateral ankle area, wherein the second stabilizing element may extend at least partially into a medial ankle area. Hence, the ankle, e.g., the ankle joint, may be further protected against twisting and/or injuries.

The first stabilizing element and the second stabilizing element may be configured to clasp a Calcaneus bone and thereby in some embodiments do not apply a pressure to the Achilles area and/or the Achilles tendon insertion. By clasping the Calcaneus bone, the heel of a wearer may be fixed within the shoe. By fixating the heel of a wearer within the shoe, an instability due to heel slippage inside the shoe may be avoided. By avoiding the application of a pressure onto the Achilles area and/or the Achilles tendon insertion, comfortability may be increased and the risk of irritation or even inflammation may be reduced.

Further, the first stabilizing element and the second stabilizing element may avoid covering a portion of the shoe upper which is configured to receive the Achilles area and/or the Achilles tendon insertion. Hence, the portion of the shoe upper which is configured to receive the Achilles area and/or the Achilles tendon insertion may remain uncovered from the stabilizing elements. By avoiding covering such portion, the application of a pressure onto the Achilles area and/or the Achilles tendon insertion may be avoided. Thus, comfortability may be increased and the risk of irritation or even inflammation may be reduced.

The first stabilizing element and the second stabilizing element may be spaced apart by a distance which extends along the outside of the shoe upper and at least partly along the Achilles area. This may avoid that an uncomfortable pressure on the Achilles area is applied. Particularly, it may be avoided that the stabilizing elements exert a pressure on the insertion of the Achilles tendon. Hence, the comfortability of the shoe may be increased and/or irritations of the Achilles tendon may be avoided. As the distance extends at least partly along the Achilles area and along the outside of the shoe upper it will be understood that the distance may be represented by a curved line. Further, the distance may be measured from the rearmost point of the first stabilizing element to the rearmost point of the second stabilizing element. The distance may lie in the range from 10 mm to 50 mm, or in the range from 20 mm to 35 mm, or in the range from 25 mm to 30 mm. Said distances have proven to provide for sufficient stabilization while at the same time avoiding the application of a pressure on the Achilles area. The distance may be measured in a plane which is perpendicular to the plane of expansion of the outsole of the shoe.

Further, at least one of the inner layer or the outer layer of the stabilizing element may be located between an innermost and an outermost layer of the shoe upper. Thus at least one of the inner layer or the outer layer of the stabilizing element may extend along an outside of an inner layer or an intermediate layer of the shoe upper.

As mentioned above, the first object underlying some embodiments is at least partially achieved by the second aspect.

The second aspect refers to a shoe comprising:

a shoe upper; an outsole; and a first stabilizing element,

-   -   wherein the first stabilizing element extends from a lateral         side of the outsole upward towards a step-in opening of the shoe         upper and rearward towards (e.g., into) a heel region of the         shoe,     -   wherein the first stabilizing element comprises an inner layer         and an outer layer, wherein the first stabilizing element         extends along an outside of the shoe upper; and         a second stabilizing element,     -   wherein the second stabilizing element extends from a medial         side of the outsole upward towards a step-in opening of the shoe         upper and rearward towards (e.g., into) a heel region of the         shoe,     -   wherein the second stabilizing element comprises an inner layer         and an outer layer,     -   wherein the second stabilizing element extends along an outside         of the shoe upper, and wherein the first stabilizing element and         the second stabilizing element are spaced apart by a distance         which extends along the outside of the shoe upper and at least         partly along the Achilles area.

The shoe according to the second aspect may avoid that an uncomfortable pressure on the Achilles area is applied. Particularly, it may be avoided that the stabilizing elements exert a pressure on the insertion of the Achilles tendon. Hence, the comfortability of the shoe may be increased and/or irritations of the Achilles tendon may be avoided. As the distance extends at least partly along the Achilles area and along the outside of the shoe upper, it will be understood that the distance may be represented by a curved line. Further, the distance may be measured from the rearmost point of the first stabilizing element to the rearmost point of the second stabilizing element. The distance may lie in the range from 10 mm to 50 mm, or in the range from 20 mm to 35 mm, or in the range from 25 mm to 30 mm. Said distances have proven to provide for sufficient stabilization while at the same time avoiding the application of a pressure on the Achilles area. The distance may be measured in a plane which is perpendicular to the plane of expansion of the outsole of the shoe. The superior rearmost edge of the first stabilizing element according to the first aspect may comprise said rearmost point of the first stabilizing element. The superior rearmost edge of the second stabilizing element according to the first aspect may comprise said rearmost point of the second stabilizing element. Further, in alternative embodiments, the distance may be measured from the superior rearmost edge of the first stabilizing element to superior rearmost edge of the second stabilizing element.

In the shoe according to the second aspect, a line on the outside of the shoe upper which extends substantially straight along the Achilles area, from the outsole to the step-in opening may be not covered by the inner layer and/or the outer layer of the first stabilizing element and/or the second stabilizing element. Thereby, in some embodiments, said line is neither covered by the first stabilizing element nor by the second stabilizing element. By use of said line on the outside of the shoe upper which extends substantially straight along the Achilles area, from the outsole to the step-in opening and which is not covered by the inner layer and/or the outer layer of the first stabilizing element and/or the second stabilizing element, the mobility of the Achilles tendon may be enhanced, improving comfort and/or functionality. This is as the influence of the inner layer(s) and/or the outer layer(s) on a stretching and/or a relaxation of the Achilles tendon is at least reduced. Particularly, as the stretching and/or the relaxation of the Achilles tendon may then be primarily limited by the material of the shoe upper.

It is understood that the features of the first aspect may be combined with the second aspect. In particular, the first stabilizing element and/or the second stabilizing element of the second aspect may comprise features of the stabilizing element of the first aspect described herein. Hence, the benefits of the first aspect may also apply for the second aspect and vice versa.

As mentioned above, the first object underlying some embodiments is at least partially achieved by the third aspect.

The third aspect relates to a shoe comprising a shoe upper, an outsole, and a stabilizing element. The stabilizing element extends from the outsole upward towards a step-in opening of the shoe upper and rearward towards a heel region of the shoe. Further, the stabilizing element comprises an inner layer and an outer layer. Moreover, the stabilizing element extends along an outside of the shoe upper. Furthermore, the stabilizing element extends at least partly along a midfoot region of the upper. Said midfoot region may comprise a region of the upper corresponding to the metatarsal bones. It is understood that the features of the first aspect may be applied to the third aspect. In particular, the stabilizing element of the third aspect may comprise features of the stabilizing element of the first aspect described herein. Hence, the benefits of the first aspect may also apply for the third aspect and vice versa.

Moreover, the rearmost edge of the stabilizing element may be arranged in an anterior direction from the malleolus of a side of the foot, which said stabilizing element is arranged on, when the shoe is worn. Further, the stabilizing element may substantially clasp a midfoot portion of the wearer's foot. Moreover, the stabilizing element may extend from a front half of the shoe. Thereby, the shapes which are suggested regarding the stabilizing element of the first aspect may allow for stabilizing elements which are adapted to the shape of the foot of a wearer and provide improved stabilization for the midfoot portion.

As mentioned above, the second object underlying some embodiments is at least partially achieved by the fourth aspect.

The fourth aspect refers to a method for manufacturing at least one lockdown element in a shoe upper. The method comprises the steps of providing a shoe upper, embossing at least one cavity into the shoe upper, and filling the cavity at least partially with a foam.

The lockdown element according to some embodiments may be referred to as an embossed cavity which is at least partially filled with foam. The lockdown element may be arranged to keep the foot of a wearer fixed inside a shoe. Particularly, the lockdown element may serve to lock the foot of a wearer down inside the shoe. Further, the lockdown element may prevent the foot from slipping out in a midfoot area of the shoe.

The shoe upper may comprise a polymer material and/or a natural material, such as leather and/or natural fibers. Moreover, the shoe upper may comprise a woven material, a knitted material, a material with unidirectional fibers and/or a material without fibers. The shoe upper may be for a sports shoe, a daytime shoe, a casual shoe, and/or a work shoe. Further, the shoe upper may be for a soccer shoe, a running shoe, a mountaineering boot, a climbing boot, a ski boot, a cross-country skiing boot, and/or a basketball shoe. The mentioned examples are not exhaustive.

The step of embossing creates space for the foam. Moreover, the step of embossing reduces relaxation and/or stretching of the formed cavity which is at least partially filled with foam. Thus, a greater stiffness and therefore stability of the lockdown element may be obtained. This is especially suitable for laceless shoes, such as laceless soccer shoes.

The step of embossing may be performed by use of an embossing machine. The embossing machine may comprise a positive mold and/or a negative mold. Moreover, the step of embossing may comprise heating the shoe upper and/or at least one mold. Thereby, during embossing a material of the shoe upper may at least partially exceed a glass transition temperature. Further, during embossing, the shoe upper may be at least partially melted. Thus, the shape of the cavity may be formed permanently.

During embossing a surface adjacent to the cavity may be at least partially melted and/or pressed. Hence, the rigidity of the adjacent surface may be increased. Thus, the stability of the lockdown element may be further increased.

The foam in the cavity may be compressed when a foot is inserted into the shoe upper. Due to the compression, the foam may exert a pressure onto the foot. Said pressure may prevent the foot from slipping out of the shoe upper. The foam may be a polymer foam. Particularly, the foam may be an ethylene-vinyl acetate foam, a neoprene foam, a polyurethane foam, a polyethylene foam, a polystryrol foam, or a polyethylenterephthalate foam. Particularly ethylene-vinyl acetate foams and neoprene foam offer a high durability against environmental conditions.

The method may further comprise the step of providing a layer over the cavity, whereby the cavity is at least partially closed. Further, the cavity may be fully closed by the layer. The layer may be a textile layer such as a mesh textile layer. Further, the layer may serve to fix and/or protect the foam inside the cavity. By use of the layer, the foot being in contact with the shoe upper is avoided from being irritated by an edge of the embossed cavity.

The cavity may be embossed on an inside surface of the shoe upper, such that the shape of the cavity in some embodiments protrudes on an outside of the shoe upper. Hence, the foam may protrude on the inside of the shoe upper. Thus, the foam may exert a pressure onto a foot being in contact with the inside surface of the shoe upper.

The foam may protrude inwardly and/or outwardly from the shoe upper, relative to a surface of the shoe upper adjacent the cavity which was not embossed. Thus, the foam may have enough volume which may be compressed, such that sufficient force may be applied on a foot which contacts the shoe upper.

The cavity may be embossed on a lateral and/or a medial side of the shoe upper. Hence, the lateral and/or the medial side of a foot may be fixed inside the shoe upper.

The cavity may have a cross-section which is at least partially annular, oval, elliptical, triangular and/or rectangular. By use of said cross sections, the spring characteristics and/or the damping characteristics of the lockdown element may be adapted. Exemplarily, by use of a triangular cross-section, a more progressive spring characteristic may be obtained than by use of a rectangular cross-section. A progressive spring characteristic may provide comfort and at the same time sufficient protection against slipping out of the shoe upper.

The cavity may be elongated along the shoe upper. Thereby the foam inside the cavity may apply a force along the shoe upper when a foot contacts the shoe upper. Hence, multiple areas of the foot may be fixed and/or damped. Moreover, the force which is applied onto the foot may be distributed. Thus, the shoe upper may be more comfortable.

The cavity may extend from an ankle area of the shoe upper into a midfoot area of the shoe upper. Particularly, the cavity may extend from an ankle area of the shoe upper into a top midfoot area of the shoe upper. Thus, the foot may be prevented from slipping out in the midfoot area. Moreover, at the same time the foot may be prevented from slipping out in the ankle area.

The term ankle in some embodiments may be also referred to as ankle joint. Further, the term ankle area according to some embodiments in general refers to the area of the shoe upper which covers the area of the foot which comprises the ankle, e.g., the ankle joint. The term medial ankle area according to some embodiments may refer to the area of the shoe upper which covers the area of the foot which comprises ligaments between Tibia and Calcaneus bone. Further, the term lateral ankle area according to some embodiments may refer to the area of the shoe upper which covers the area of the foot which comprises ligaments between Fibula and Calcaneus bone.

The cavity may comprise a length and a width, wherein the ratio of the length to the width in some embodiments is from 5 to 18, or from 7 to 16, or from 9 to 14, or from 10 to 12. Thereby the ratio may be defined by the maximum width and/or the maximum length. These ratios provide an improved stabilization and at the same time are comfortable for the foot of a wearer. In some embodiments, the ratio of the length to the width is from 5 to 8.

The cavity may extend along 20% to 80%, or 25% to 75%, or 30% to 65%, or 40% to 60%, or 45% to 55% of a length of the shoe upper. These ranges were found to provide sufficient pressure on the foot of a wearer, while avoiding superfluous cavity space.

A cross sectional area of the cavity and/or the width of the cavity may reach a maximum value in a mid portion of the cavity which is in some embodiments spaced apart from one end of the cavity by the length of the cavity multiplied by a factor of 0.3 to 0.7, or of 0.35 to 0.65, or of 0.4 to 0.6, or of 0.45 to 0.55, or from 0.48 to 0.52. Thereby the foam of the lockdown element may apply the highest pressure on the area of the foot which lies in the middle between the top midfoot area and the ankle area. Thus, the area of the foot, which tends to slip out most, is subjected to the greatest pressure. Moreover, the foot thereby may be pressed rearward in the shoe upper into the heel portion. This may provide further protection against slipping out.

The cross sectional area of the cavity and/or the width of the cavity may reach a minimum value in the midfoot area and/or the ankle area. This allows the pressure of the lockdown element to fade out towards the ends. Hence the comfort for the wearer may be increased. Further, the application of pressure may be reduced in areas where less pressure is suitable and/or where pressure is uncomfortable, e.g., the ankle area and/or the midfoot area.

A first cavity may be embossed on a lateral side of the shoe upper, and a second cavity may be embossed on a medial side of the shoe upper. Hence, the lateral side and the medial side of the foot may be equally fixed against slipping out. The second cavity may be located more upward, e.g., closer to the step-in opening, than the first cavity. Thus, the positioning of the lockdown elements is adapted to the anatomy of the wearer's foot. It will be understood that the first cavity and the second cavity may be at least partially filled with foam.

Further, the second object is at least partially achieved by a shoe upper comprising at least one lockdown element, wherein the lockdown element is manufactured by a method as described above.

Even further, the second object is at least partially achieved by a shoe comprising a shoe upper according to the previous paragraph. Thereby the shoe may be a sports shoe, a daytime shoe, a casual shoe, and/or a work shoe. Further, said shoe may be a soccer shoe, a running shoe, a mountaineering boot, a climbing boot, a ski boot, a cross-country skiing boot, and/or a basketball shoe. The mentioned examples are not exhaustive.

DETAILED DESCRIPTION

The subject matter of embodiments of some embodiments is described here with specificity to meet statutory requirements, but this description is not necessarily intended to limit the scope of the claims. The claimed subject matter may be embodied in other ways, may include different elements or steps, and may be used in conjunction with other existing or future technologies. This description should not be interpreted as implying any particular order or arrangement among or between various steps or elements except when the order of individual steps or arrangement of elements is explicitly described.

FIG. 1 shows an exemplary shoe 1 according to the first aspect of some embodiments in lateral view. The shoe 1 is a soccer shoe. However, it is understood that the shoe may also be a running shoe, a mountaineering boot, a climbing boot, a ski boot, a cross-country skiing boot, and/or a basketball shoe. Even further, the shoe may be any other sports shoe, a daytime shoe, a casual shoe, and/or a work shoe. The mentioned examples are not exhaustive.

FIG. 1 (in accordance with the first aspect of some embodiments) shows a shoe 1 comprising a shoe upper 2, an outsole 3, and a stabilizing element 10.

The stabilizing element 10 serves to fix the heel of a wearer within the shoe 1 and to stabilize the ankle of a wearer. By fixating the heel of a wearer within the shoe 1, an instability due to heel slippage inside the shoe may be avoided. Moreover, by stabilizing the ankle of a wearer, a twisting of the ankle may be avoided.

Said stabilizing element 10 extends from the outsole 3 upward towards a step-in opening 4 of the shoe upper 2 and rearward towards a heel region 5 of the shoe 1. Particularly, the stabilizing element 10 extends rearward into a heel region 5 of the shoe 1. Said stabilizing element 10 comprises an outer layer 12. Further, the stabilizing element 10 extends along an outside 6 of the shoe upper 2. Thereby the outer layer 12 is in contact with the outside 6 of the shoe upper 2. It will be understood that the outer layer 12 may be attached to the outside 6 of the shoe upper 2, e.g., by use of thermal welding, gluing, and/or stitching. Moreover, an area 13 of the outside 6 of the shoe upper 2 which is located between the stabilizing element 10 and the outsole 3 is not covered by the stabilizing element 10.

Said area 13 which is not covered by the stabilizing element 10 avoids or at least reduces a pressure being applied on the Achilles area. Particularly, said area may avoid that the stabilizing element 10 exerts a pressure on an insertion of the Achilles tendon. Hence, the comfortability of the shoe 1 may be increased and/or irritations of the Achilles tendon may be avoided.

As further depicted by FIG. 1 and in accordance with the first aspect, the outer layer 12 of the stabilizing element 10 is integrally formed with the outsole 3 of the shoe 1. By integrally forming the outer layer with the outsole, the outer layer may be provided with a higher pretension. Accordingly, a higher pressure onto the heel region of the wearer may be applied. Furthermore, the manufacturing steps may be reduced. It will be understood that in FIG. 1 the “outer layer” may be also more generally referred to as “layer” since the stabilizing element comprises only one layer.

FIG. 2 shows an exemplary shoe 1 according to the first aspect and the fourth aspect of some embodiments in lateral view. The shoe 1 is a laceless soccer shoe. However, it is understood that the shoe may also be a running shoe, a mountaineering boot, a climbing boot, a ski boot, a cross-country skiing boot, and/or a basketball shoe. Even further, the shoe may be any other sports shoe, a daytime shoe, a casual shoe, and/or a work shoe. The mentioned examples are not exhaustive.

FIG. 2 in accordance with the first aspect of some embodiments shows a shoe 1 comprising a shoe upper 2, an outsole 3, and a stabilizing element 10.

The stabilizing element 10 serves to fix the heel of a wearer within the shoe 1 and to stabilize the ankle of a wearer. By fixating the heel of a wearer within the shoe 1, an instability due to heel slippage inside the shoe may be avoided. Moreover, by stabilizing the ankle of a wearer a twisting of the ankle may be avoided.

Said stabilizing element 10 extends from the outsole 3 upward towards a step-in opening 4 of the shoe upper 2 and rearward towards, e.g., into, a heel region 5 of the shoe 1. Said stabilizing element 10 comprises an inner layer 11 and an outer layer 12. Further, the stabilizing element 10 extends along an outside 6 of the shoe upper 2. Moreover, an area 13 of the outside 6 of the shoe upper 2 which is located between the stabilizing element 10 and the outsole 3 is not covered by the stabilizing element 10. The inner layer 11 and the outer layer 12 comprise different materials.

Said area 13 which is not covered by the stabilizing element 10 avoids or at least reduces a pressure being applied on the Achilles area. Particularly, said area (13) may avoid that the stabilizing element 10 exerts a pressure on an insertion of the Achilles tendon. Hence, the comfortability of the shoe 1 may be increased and/or irritations of the Achilles tendon may be avoided.

The area 13 of the outside 6 of the shoe upper 2 which is not covered by the stabilizing element 10 and located between the stabilizing element 10 and the outsole 3 continuously transitions into a further area 18 (e.g., FIG. 7 and FIG. 11 ) of the outside 6 of the shoe upper 2 which is not covered by the stabilizing element 10. Thereby, as e.g., depicted in more detail in FIG. 7 and FIG. 11 , the further area 18 extends into a portion of the shoe upper 2 which is configured to receive an Achilles area and/or an Achilles tendon insertion, whereby the further area 18 extends from a lateral side of the shoe 1 to a medial side of the shoe 1. Said further area 18 may avoid that an uncomfortable pressure on the Achilles area is applied. Particularly, said further area 18 may avoid that the stabilizing element 10 exerts a pressure on an insertion of the Achilles tendon. Moreover, the flexibility of the shoe upper 2 may be not impeded by the stabilizing element 10 in the Achilles area and/or at the Achilles tendon insertion. Hence, the comfortability of the shoe 1 may be increased and/or irritations of the Achilles tendon may be avoided.

The use of different materials allows a separation of functions. The inner layer in some embodiments comprises a material with a higher stiffness and/or a higher strength than the outer layer. Further, the outer layer may comprise a material with a higher elasticity than the inner layer. Thus, the inner layer may provide stiffness and/or strength, whereas the outer layer may clasp the inner layer to the shoe upper. Accordingly, the stabilizing element may be firmly clasped to the heel and/or the ankle of a wearer. Thereby, the stability may be increased. Further, due to the specific use of materials, the weight of the stabilizing element may be reduced. Moreover, the inner layer may be adapted to the properties of the foot of a wearer, whereas the outer layer may remain unchanged. Hence, due to the use of different materials and the separation of functions in the stabilizing element, the modification effort may be reduced.

Further in accordance with the first aspect, the shoe 1 of FIG. 2 comprises two stabilizing elements 10, 15, wherein a first stabilizing element 10 is arranged on a lateral side of the shoe 1. A second stabilizing element 15 is arranged on a medial side of the shoe 1. However, said second stabilizing element 15 is hidden in FIG. 2 , but shown in FIG. 4 . Said first stabilizing element 10 extends at least partially into a lateral ankle area 7 a (e.g., FIG. 2 and FIG. 3 ). The first stabilizing element 10 (e.g., FIG. 3 ) and the second stabilizing element 15 (e.g., FIG. 4 ) are configured to clasp a Calcaneus bone and thereby do not apply a pressure to an Achilles tendon insertion.

FIG. 2 in accordance with the fourth aspect of some embodiments shows a shoe 1 comprising a shoe upper 2, wherein the shoe upper 2 comprises a lockdown element 20. The lockdown element 20 was manufactured according to a method 100 as depicted in FIG. 6 .

FIG. 3 shows a detailed view of a rear portion of an exemplary shoe according to the first aspect and the fourth aspect of some embodiments in lateral view.

FIG. 3 in accordance with the first aspect of some embodiments shows that a shape of the stabilizing element 10 is at least limited by two straight edges 14 a, 14 b which extend along the outside 6 of the shoe upper 2 upward towards the step-in opening and rearward towards the heel region 5. Thereby the two edges 14 a, 14 b have a length of at least 15 mm. With said two straight edges 14 a, 14 b limiting the shape of the stabilizing element 10, it may be ensured that no or only reduced pressure is applied on the Achilles tendon insertion.

As further depicted by FIG. 3 and in accordance with the first aspect, the outer layer 12 of the stabilizing element 10 is integrally formed with the outsole 3 of the shoe 1. By integrally forming the outer layer with the outsole, the outer layer may be provided with a higher pretension against the inner layer 11. Accordingly, a higher pressure onto the heel region of the wearer may be applied. Furthermore, the manufacturing steps may be reduced.

The shape of the inner layer 11 corresponds to the shape of the outer layer 12. This allows loads to be transferred continuously between the inner and outer layer. Thereby a homogeneous stress distribution may be achieved. Hence material damages due to stress concentrations may be avoided. Moreover, the inner layer 11 has a larger contour than the outer layer 12. Thereby the inner layer 11 serves to cover the areas of the shoe upper which are supposed to be stabilized, wherein the outer layer 12 serves to press the inner layer 11 towards the inside of the shoe.

The inner layer 11 in some embodiments comprises a composite layer, wherein the composite layer in some embodiments is a fiber reinforced layer.

FIG. 4 shows a detailed view of a rear portion of the exemplary shoe according to the first aspect and the fourth aspect of some embodiments in medial view.

FIG. 4 in accordance with the first aspect of some embodiments shows the stabilizing element 15 extending at least partially into the medial ankle area 7 b. What has been described above with respect to the stabilizing element 10 arranged on the lateral side of the shoe upper applies to the stabilizing element 15 arranged on the medial side of the shoe upper analogously. In other embodiments, however, the lateral and medial stabilizing elements may differ, e.g., with respect to their size, shape, materials, etc.

FIG. 5 shows a detailed view of the exemplary shoe according to the first aspect and the fourth aspect of some embodiments in lateral view.

FIG. 5 in accordance with the fourth aspect of some embodiments shows a detail of the shoe 1 as depicted in FIG. 2 , comprising a shoe upper 2, wherein the shoe upper 2 comprises a lockdown element 20. Said lockdown element 20 was manufactured according to a method 100 as depicted in FIG. 6 . Said method 100 comprises the steps of providing 110 a shoe upper 2, embossing 120 at least one cavity 21 into the shoe upper 2, and filling 130 the cavity 21 at least partially with a foam. Moreover, the method 100 may further comprise the step of providing 140 a layer over the cavity 21, whereby the cavity 21 is at least partially closed.

As depicted in FIGS. 5 and 7 , the cavity 21 is embossed 120 on an inside surface 30 (e.g., FIG. 5 and FIG. 7 ) of the shoe upper 2, such that the shape of the cavity 21 protrudes on an outside 6 (e.g., FIG. 5 and FIG. 7 ) of the shoe upper 2. Thereby, the foam, which is hidden, may protrude inwardly and/or outwardly from the shoe upper 2, relative to a surface 23 (e.g., FIG. 5 ) of the shoe upper 2 adjacent the cavity 21 which was not embossed.

The cavity 21 is embossed on a lateral side of the shoe upper 2 and has a cross-section which is at least partially triangular. Moreover, the cavity 21 is elongated along the shoe upper 2. Thereby the cavity 21 extends from an ankle area 7 a, of the shoe upper 2 into a midfoot area 8 of the shoe upper 2. Particularly, in FIG. 5 the cavity 21 extends from a lateral ankle area 7 a, whereas in FIG. 4 the cavity 21 extends from a medial ankle area 7 b. Thereby the cavity 21 extends along 30% to 65% of a length of the shoe upper 2. This range provides sufficient pressure on the foot of a wearer, while avoiding superfluous cavity space.

Moreover, a cross sectional area of the cavity 21 and the width of the cavity 21 reach a maximum value in a mid portion of the cavity 21 which is spaced apart from one end of the cavity 21 by the length of the cavity 21 multiplied by a factor of 0.45 to 0.55. Thereby the foam of the lockdown element 20 applies the highest pressure on the area of the foot which lies in the middle between the top midfoot area and the ankle area. Thus, the area of the foot, which tends to slip out the most, is subject to the greatest pressure. Moreover, the foot thereby may be pressed rearward in the shoe upper into the heel portion. This may provide further protection against slipping out.

Further, the cross sectional area of the cavity 21 and the width of the cavity 21 reach a minimum value in the midfoot area 8 and the ankle area 7 a, 7 b. This allows the pressure of the lockdown element to fade out towards the ends. Hence, the comfort for the wearer may be increased.

As depicted by FIGS. 4 and 5 , a first cavity 21 is embossed on a lateral side of the shoe upper 2, and a second cavity 26 is embossed on a medial side of the shoe upper 2. Hence, the lateral side and the medial side of the foot are equally fixed against slipping out.

FIG. 6 depicts an exemplary method 100 for manufacturing at least one lockdown element 20 in a shoe upper 2 according the fourth aspect of some embodiments. The method 100 comprises the steps of providing 110 a shoe upper 2, embossing 120 at least one cavity 21 into the shoe upper 2, and filling 130 the cavity 21 at least partially with a foam. Moreover, the method 100 may further comprise the step of providing 140 a layer over the cavity 21, whereby the cavity 21 is at least partially closed.

FIG. 7 shows a second exemplary shoe 1 according to the first aspect, the second aspect, and the fourth aspect of some embodiments in rear view. Thereby a first stabilizing element 10 and a second stabilizing element 15 are spaced apart by a distance 32 which extends at least partly along the Achilles area and along the outside of a shoe upper 2. Thereby it may be avoided that an uncomfortable pressure on the Achilles area is applied. Particularly, it may be avoided that the stabilizing elements 10, 15 exert a pressure on the insertion of the Achilles tendon. Hence, the comfortability of the shoe 1 may be increased and/or irritations of the Achilles tendon may be avoided. As illustrated in FIG. 7 , the distance 32 is measured from the rearmost point of the first stabilizing element 10 to the rearmost point of the second stabilizing element 15.

Further, in accordance with the second aspect of some embodiments, FIG. 7 shows a second exemplary shoe 1 comprising a shoe upper 2, an outsole 3, a first stabilizing element 10, and a second stabilizing element 15. The first stabilizing element 10 extends from a lateral side of the outsole 3 upward towards a step-in opening 4 of the shoe upper 2 and rearward into a heel region 5 of the shoe 1. Further, the first stabilizing element 10 comprises an inner layer 11 and an outer layer 12. Moreover, the first stabilizing element 10 extends along an outside 6 of the shoe upper 2. The second stabilizing element 15 extends from a medial side of the outsole 3 upward towards a step-in opening 4 of the shoe upper 2 and rearward into a heel region 5 of the shoe 1. Further, the second stabilizing element 15 comprises an inner layer 16 and an outer layer 17. Moreover, the second stabilizing element 15 extends along an outside 6 of the shoe upper 2. The first stabilizing element 10 and the second stabilizing element 15 are spaced apart by a distance 32 which extends along the outside 6 of the shoe upper 2 and at least partly along the Achilles area.

Even though only FIGS. 7 and 12 depict a first stabilizing element and a second stabilizing element as suggested by the second aspect of some embodiments, it will be understood that features being depicted in FIGS. 8, 10, and 11 may also form part of the second aspect of some embodiments. This is as the FIGS. 7, 8, and 10 to 12 all depict the second exemplary shoe. Further, it will be understood that the features of the first exemplary shoe may also form part of the second aspect of some embodiments. This is as shown in FIGS. 2 and 4 , the first exemplary shoe also comprises a first stabilizing element and a second stabilizing element as suggested by the second aspect of some embodiments.

FIG. 8 shows a bottom view of the second exemplary shoe 1 according to the first aspect and the fourth aspect of some embodiments. As illustrated, an outsole 3 comprises an embedded carbon sole insert 40. The carbon sole insert 40 may be referred to as composite module as described above. Accordingly, the inner layers of the stabilizing elements 10, 15 may be connected to each other via carbon sole insert 40, e.g., the composite module. Same applies for the outer layers. Thereby the stabilization may be further improved without applying a pressure on the Achilles area and particularly the Achilles tendon insertion.

FIG. 9 shows a front view of a third exemplary shoe 1 according to the fourth aspect of some embodiments. As illustrated, a first cavity 21 is embossed on a lateral side of a shoe upper 2, and a second cavity 26 is embossed on a medial side of the shoe upper 2. Thereby, the lateral side and the medial side of the foot may be equally fixed against slipping out. As further illustrated, the second cavity 26 is located more upward, e.g., closer to a step-in opening 4, than the first cavity 21. Thus, the positioning of lockdown elements 20, 25 is adapted to the anatomy of the wearer's foot.

FIG. 10 shows the second exemplary shoe according to the first aspect and the fourth aspect of some embodiments in medial view.

According to the first aspect of some embodiments, the inner layer 16 of a second stabilizing element 15 extends beyond an outer layer 17 of the second stabilizing element 15. Particularly, the inner layer 16 extends beyond the outer layer 17 rearwards towards the Achilles area and upwards towards the step-in opening. Thus, the inner layer can increase the support of the stabilizing element for the foot. Further, the inner layer 16 extends beyond the outer layer 17 in an anterior direction towards a toe region of the foot. Thereby, the outer layer 17 can serve to press the inner layer 16 towards the inside of the shoe 1. Hence, the areas of the shoe upper 2 which are supposed to be stabilized may be easily amended by adapting the inner layer 16, whereas the outer layer 17 may remain unchanged.

Further according to the first aspect of some embodiments, the shape of an inner layer 16 of a second stabilizing element 15 corresponds to the shape of an outer layer 17 of the second stabilizing element 15. Particularly, the shape of the outer layer 17 lies within the inner layer and three edges of the inner layer and the outer layer are substantially parallel. This allows loads to be transferred continuously between the inner and outer layer. Thereby a homogeneous stress distribution may be achieved.

According to the fourth aspect of some embodiments, an embossed second cavity 26 of a second lockdown element 25 has a cross-section which is at least partially annular. Compared to the substantially triangular cross-section exemplarily depicted in FIGS. 2 to 5 , a less progressive spring characteristic may be obtained. A less progressive spring characteristic may provide improved comfort.

FIG. 11 shows a detailed view of the second exemplary shoe 1 according to the first aspect and the fourth aspect of some embodiments. As depicted, the outer layer 17 of the second stabilizing element 15 comprises a varying thickness. Particularly, a step 51 in the surface of the outer layer 17 separates portions of the outer layer 17 with different thicknesses. Said step 51 is a discontinuous change in the surface of the outer layer 17. As further illustrated, the outer layer 17 comprises a reinforcement rib 50 which comprises the step 51. As shown in FIG. 12 , the first stabilizing element 10 so as the second stabilizing element 15 also comprises a reinforcement rib 50.

FIG. 12 shows a detailed view of the second exemplary shoe according to the first aspect, the second aspect and the fourth aspect of some embodiments. The reinforcement rib 50 of the first stabilizing element 10 extends from the outsole 3 along the outer layer 12 of the stabilizing element 10. The outer layer 12 of the stabilizing element is integrally formed with the outsole or a component of the outsole. Moreover, the reinforcement rib 50 extends essentially along the full length of the stabilizing element 10. The reinforcement rib 50 further extends at least partly along the outsole 3, wherein this aspect is also illustrated in FIG. 10 .

In the following, further examples and aspects are described to facilitate the understanding of the invention:

EXAMPLE 1

A shoe (1) comprising:

a shoe upper (2); an outsole (3); and a stabilizing element (10), wherein the stabilizing element (10) extends from the outsole (3) upward towards a step-in opening (4) of the shoe upper (2) and rearward towards a heel region (5) of the shoe (1), wherein the stabilizing element (10) comprises an outer layer (12), wherein the stabilizing element (10) extends along an outside (6) of the shoe upper (2), wherein an area (13) of the outside (6) of the shoe upper (2) is not covered by the stabilizing element (10), whereby the area (13) is located between the stabilizing element (10) and the outsole (3), wherein the area (13) continuously transitions into a further area (18) of the outside (6) of the shoe upper (2) which is not covered by the stabilizing element (10), whereby the further area (18) extends into a portion of the shoe upper (2) which is configured to receive an Achilles area and/or an Achilles tendon insertion, and wherein the outer layer (12) of the stabilizing element (10) is integrally formed with the outsole (3) of the shoe (1).

EXAMPLE 2

Shoe (1) according to the preceding example, wherein the further area (18) extends from a lateral side of the shoe (1) to a medial side of the shoe (1).

EXAMPLE 3

Shoe (1) according to one of the preceding examples, wherein the stabilizing element (10) comprises an inner layer (11).

EXAMPLE 4

A shoe (1) comprising:

a shoe upper (2); an outsole (3); and a stabilizing element (10), wherein the stabilizing element (10) extends from the outsole (3) upward towards a step-in opening (4) of the shoe upper (2) and rearward towards a heel region (5) of the shoe (1), wherein the stabilizing element (10) comprises an inner layer (11) and an outer layer (12), wherein the inner layer (11) and the outer layer (12) comprise different materials, and wherein the stabilizing element (10) extends along an outside (6) of the shoe upper (2).

EXAMPLE 5

Shoe (1) according to the preceding example, wherein the outer layer (12) of the stabilizing element (10) is integrally formed with the outsole (3) of the shoe (1).

EXAMPLE 6

Shoe (1) according to example 3, wherein the inner layer (11) and the outer layer (12) comprise different materials.

EXAMPLE 7

Shoe (1) according to example 4, wherein an area (13) of the outside (6) of the shoe upper (2) is not covered by the stabilizing element (10), whereby the area (13) is located between the stabilizing element (10) and the outsole (3).

EXAMPLE 8

Shoe (1) according to the preceding example, wherein the area (13) continuously transitions into a further area (18) of the outside (6) of the shoe upper (2) which is not covered by the stabilizing element (10), whereby the further area (18) extends into a portion of the shoe upper (2) which is configured to receive an Achilles area and/or an Achilles tendon insertion, whereby the further area (18) preferably extends from a lateral side of the shoe (1) to a medial side of the shoe (1).

EXAMPLE 9

Shoe (1) according to one of the examples 1 to 3 and 6 to 8, wherein the area (13) has a size of at least 100 mm2, preferably of at least 150 mm2, more preferably of at least 200 mm2, even more preferably of at least 250 mm2, and most preferably of at least 300 mm2.

EXAMPLE 10

Shoe (1) according to one of the preceding examples, wherein the stabilizing element (10) comprises a wing shape, a parallelogram shape, a trapezoid shape, an elliptical shape, and/or a rectangular shape.

EXAMPLE 11

Shoe (1) according to one of the preceding examples, wherein a shape of the stabilizing element (10) is at least limited by two straight edges (14 a, 14 b) which extend along the outside (6) of the shoe upper (2) upward towards the step-in opening (4) and rearward towards the heel region (5), wherein the two edges (14 a, 14 b) preferably have a length of at least 10 mm, more preferably at least 15 mm, even more preferably at least 20 mm, and most preferably at least 25 mm.

EXAMPLE 12

Shoe (1) according to one of the preceding examples, wherein the outer layer (12) comprises a thickness from 0.01 mm to 3 mm, preferably from 0.1 mm to 2 mm, more preferably from 0.2 mm to 1 mm, even more preferably from 0.25 mm to 0.5 mm, and most preferably from 0.28 mm to 0.32 mm.

EXAMPLE 13

Shoe (1) according to one of examples 3 to 12, wherein the inner layer (11) comprises a thickness from 0.01 mm to 3 mm, preferably from 0.1 mm to 2 mm, more preferably from 0.2 mm to 1 mm, even more preferably from 0.25 mm to 0.5 mm, and most preferably from 0.28 mm to 0.32 mm.

EXAMPLE 14

Shoe (1) according to one of examples 3 to 13, wherein the shape of the inner layer (11) corresponds to the shape of the outer layer (12).

EXAMPLE 15

Shoe (1) according to one of examples 3 to 14, wherein the inner layer (11) extends beyond the outer layer (12).

EXAMPLE 16

Shoe (1) according to one of examples 3 to 15, wherein the inner layer (11) comprises a composite layer, wherein the composite layer preferably is a fiber reinforced layer.

EXAMPLE 17

Shoe (1) according to the preceding example, wherein the composite layer comprises a carbon fiber reinforced layer.

EXAMPLE 18

Shoe (1) according to one of the preceding examples, wherein the outer layer (12) comprises a reinforcement rib (50), preferably extending from the outsole along the outer layer (12) of the stabilizing element (10).

EXAMPLE 19

Shoe (1) according to one of the preceding examples, wherein the outer layer (12) comprises a composite layer, wherein the outer layer (12) preferably extends from a composite module of the outsole (3).

EXAMPLE 20

Shoe (1) according to one of the preceding examples, wherein a line on the outside (6) of the shoe upper (2) which extends substantially straight along the Achilles area, from the outsole (3) to the step-in opening (4) is not covered by the inner layer (11) and/or the outer layer (12), wherein preferably said line is not covered by the stabilizing element (10).

EXAMPLE 21

Shoe (1) according to one of the preceding examples, wherein the shoe (1) comprises two stabilizing elements (10, 15) as defined in one of the preceding examples, wherein preferably a first stabilizing element (10) is arranged on a lateral side of the shoe (1), wherein further preferably a second stabilizing element (15) is arranged on a medial side of the shoe (1).

EXAMPLE 22

Shoe (1) according to example 21, wherein the first stabilizing element (10) and the second stabilizing element (15) are configured to clasp a Calcaneus bone and thereby preferably do not apply a pressure to the Achilles area and/or the Achilles tendon insertion.

EXAMPLE 23

Shoe (1) according to one of examples 21 to 22, wherein the first stabilizing element (10) and the second stabilizing element (15) do not cover a portion of the shoe upper (2) which is configured to receive the Achilles area and/or the Achilles tendon insertion.

EXAMPLE 24

Shoe (1) according to one of examples 21 to 23, wherein the first stabilizing element (10) and the second stabilizing element (15) are spaced apart by a distance (32) which extends along the outside (6) of the shoe upper (2) and at least partly along the Achilles area.

Exemplary Embodiment 1. A method 100 for manufacturing at least one lockdown element 20, 25 in a shoe upper 2, wherein the method 100 comprises the steps of

a. providing 110 a shoe upper 2; b. embossing 120 at least one cavity 21 into the shoe upper 2, and c. filling 130 the cavity 21 at least partially with a foam.

Exemplary Embodiment 2. Method 100 according to Exemplary Embodiment 1, wherein the method 100 further comprises the step of

d. providing 140 a layer over the cavity 21, whereby the cavity 21 is at least partially closed.

Exemplary Embodiment 3. Method 100 according to one of the preceding Exemplary Embodiments, wherein the cavity 21 is embossed 120 on an inside surface of the shoe upper 2, such that the shape of the cavity 21 preferably protrudes on an outside 6 of the shoe upper 2.

Exemplary Embodiment 4. Method 100 according to one of the preceding Exemplary Embodiments, wherein the foam protrudes inwardly and/or outwardly from the shoe upper 2, relative to a surface 23 of the shoe upper 2 adjacent the cavity 21 which was not embossed.

Exemplary Embodiment 5. Method 100 according to one of the preceding Exemplary Embodiments, wherein the cavity 21 is embossed on a lateral and/or a medial side of the shoe upper 2.

Exemplary Embodiment 6. Method 100 according to one of the preceding Exemplary Embodiments, wherein the cavity 21 has a cross-section which is at least partially annular, oval, elliptical, triangular and/or rectangular.

Exemplary Embodiment 7. Method 100 according to one of the preceding Exemplary Embodiments, wherein the cavity 21 is elongated along the shoe upper 2.

Exemplary Embodiment 8. Method 100 according to the preceding Exemplary Embodiments, wherein the cavity 21 extends from an ankle area 7 a, 7 b of the shoe upper 2 into a midfoot area 8 of the shoe upper 2.

Exemplary Embodiment 9. Method 100 according to one of Exemplary Embodiments 7 to 8, wherein the cavity 21 comprises a length and a width, wherein the ratio of the length to the width preferably is from 5 to 18, more preferably from 7 to 16, even more preferably from 9 to 14, and most preferably from 10 to 12.

Exemplary Embodiment 10. Method 100 according to one of Exemplary Embodiments 7 to 9, wherein the cavity 21 extends along 20% to 80%, preferably 25% to 75%, more preferably 30% to 65%, even more preferably 40% to 60%, and most preferably 45% to 55% of a length of the shoe upper 2.

Exemplary Embodiment 11. Method 100 according to one of Exemplary Embodiments 9 to 10, wherein a cross sectional area of the cavity 21 and/or the width of the cavity 21 reach a maximum value in a mid portion of the cavity 21 which is preferably spaced apart from one end of the cavity 21 by the length of the cavity 21 multiplied by a factor of 0.3 to 0.7, preferably of 0.35 to 0.65, more preferably of 0.4 to 0.6, even more preferably of 0.45 to 0.55, and most preferably from 0.48 to 0.52.

Exemplary Embodiment 12. Method 100 according to one of Exemplary Embodiments 9 to 11, wherein the cross sectional area of the cavity 21 and/or the width of the cavity 21 reach a minimum value in the midfoot area 8 and/or the ankle area 7 a, 7 b.

Exemplary Embodiment 13. Method 100 according to one of the preceding Exemplary Embodiments, wherein a first cavity 21 is embossed on a lateral side of the shoe upper 2, and a second cavity 26 is embossed on a medial side of the shoe upper 2.

Exemplary Embodiment 14. A shoe upper 2 comprising at least one lockdown element 20, wherein the lockdown element 20 is manufactured by a method 100 according to one of Exemplary Embodiments 1 to 13.

Exemplary Embodiment 15. A shoe 1 comprising a shoe upper 2 according to Exemplary Embodiment 14.

Different arrangements of the components depicted in the drawings or described above, as well as components and steps not shown or described are possible. Similarly, some features and sub-combinations are useful and may be employed without reference to other features and sub-combinations. Embodiments of the invention have been described for illustrative and not restrictive purposes, and alternative embodiments will become apparent to readers of this patent. Accordingly, the present invention is not limited to the embodiments described above or depicted in the drawings, and various embodiments and modifications may be made without departing from the scope of the claims below. 

That which is claimed is:
 1. A shoe comprising: a shoe upper; an outsole; and a stabilizing element, wherein the stabilizing element extends from the outsole upward towards a step-in opening of the shoe upper and rearward towards a heel region of the shoe, wherein the stabilizing element comprises an outer layer, wherein the stabilizing element extends along an outside of the shoe upper, wherein a first area of the outside of the shoe upper is not covered by the stabilizing element, wherein the first area is located between the stabilizing element and the outsole, wherein the first area continuously transitions into a second area of the outside of the shoe upper which is not covered by the stabilizing element, wherein the second area extends into a portion of the shoe upper which is configured to receive an Achilles area and/or an Achilles tendon insertion, and wherein the outer layer of the stabilizing element is integrally formed with the outsole of the shoe.
 2. The shoe of claim 1, wherein the second area extends from a lateral side of the shoe to a medial side of the shoe.
 3. The shoe of claim 1, wherein the first area has a size of at least 200 mm².
 4. The shoe of claim 1, wherein the stabilizing element comprises a wing shape, a parallelogram shape, a trapezoid shape, an elliptical shape, and/or a rectangular shape.
 5. The shoe of claim 1, wherein a line on the outside of the shoe upper which extends substantially straight along the Achilles area, from the outsole to the step-in opening is not covered by the outer layer, wherein said line is not covered by the stabilizing element.
 6. The shoe of claim 1, wherein the stabilizing element is a first stabilizing element and the shoe comprises a second stabilizing element, wherein the first stabilizing element is arranged on a lateral side of the shoe, wherein further the second stabilizing element is arranged on a medial side of the shoe.
 7. The shoe of claim 6, wherein the first stabilizing element and the second stabilizing element are configured to clasp a Calcaneus bone and thereby do not apply a pressure to the Achilles area and/or the Achilles tendon insertion.
 8. The shoe of claim 6, wherein the first stabilizing element and the second stabilizing element do not cover a portion of the shoe upper which is configured to receive the Achilles area and/or the Achilles tendon insertion.
 9. The shoe of claim 6, wherein the first stabilizing element and the second stabilizing element are spaced apart by a distance which extends along the outside of the shoe upper and at least partly along the Achilles area.
 10. The shoe of claim 1, wherein a shape of the stabilizing element is at least limited by two straight edges which extend along the outside of the shoe upper upward towards the step-in opening and rearward towards the heel region, wherein the two edges have a length of at least 10 mm.
 11. The shoe of claim 1, wherein the stabilizing element comprises an inner layer.
 12. The shoe of claim 11, wherein the inner layer and the outer layer comprise different materials.
 13. A shoe comprising: a shoe upper; an outsole; and a stabilizing element, wherein the stabilizing element extends from the outsole upward towards a step-in opening of the shoe upper and rearward towards a heel region of the shoe, wherein the stabilizing element comprises an inner layer and an outer layer, wherein the inner layer and the outer layer comprise different materials, and wherein the stabilizing element extends along an outside of the shoe upper.
 14. The shoe of claim 13, wherein the outer layer of the stabilizing element is integrally formed with the outsole of the shoe.
 15. The shoe of claim 13, wherein a first area of the outside of the shoe upper is not covered by the stabilizing element, wherein the first area is located between the stabilizing element and the outsole.
 16. The shoe of claim 15, wherein the first area continuously transitions into a second area of the outside of the shoe upper which is not covered by the stabilizing element, wherein the second area extends into a portion of the shoe upper which is configured to receive an Achilles area and/or an Achilles tendon insertion, wherein the second area extends from a lateral side of the shoe to a medial side of the shoe.
 17. The shoe of claim 13, wherein the outer layer comprises a thickness from 0.01 mm to 3 mm.
 18. The shoe of claim 13, wherein the shape of the inner layer corresponds to the shape of the outer layer.
 19. The shoe of claim 13, wherein the inner layer extends beyond the outer layer.
 20. The shoe of claim 13, wherein the inner layer comprises a composite layer, wherein the composite layer comprises a carbon fiber reinforced layer. 